k-fold cross validation, a splitFunction in the sense of vtreat::buildEvalSets

k-fold cross validation, a splitFunction in the sense of vtreat::buildEvalSets

kWayCrossValidation(nRows, nSplits, dframe, y)

Arguments

nRows	number of rows to split (>1).
nSplits	number of groups to split into (>1,<=nRows).
dframe	original data frame (ignored).
y	numeric outcome variable (ignored).

Value

split plan

Examples

kWayCrossValidation(7,2,NULL,NULL)
#> [[1]]
#> [[1]]$train
#> [1] 2 4 5 6
#> 
#> [[1]]$app
#> [1] 7 1 3
#> 
#> 
#> [[2]]
#> [[2]]$train
#> [1] 1 3 7
#> 
#> [[2]]$app
#> [1] 6 2 5 4
#> 
#> 
#> attr(,"splitmethod")
#> [1] "kwaycross"